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    Re: Fluids for Bubble Sextants and Sealing Methods
    From: Paul Dolkas
    Date: 2015 Dec 28, 21:37 -0800

    I gave up trying to open mine up – the threaded rings seemed to be welded to the housing. Perhaps they were glued shut to improve sealing…  Is there any magic solvent that will help?

     

    Paul Dolkas

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Robert Swartz
    Sent: Monday, December 28, 2015 10:55 AM
    To: paul{at}dolkas.net
    Subject: [NavList] Re: Fluids for Bubble Sextants and Sealing Methods

     

    When I restore Link A-12 bubble sextants, I follow the manufacturer's specifications and use xylene. The bubble chambers must be clean internally and the white lead oxidation around the seals should be scraped off. Then you can paint a ring of clear shellac to insure seal. Also be sure to seal the filler plug bristol screw after tightening. Don' forget to insert the ball bearing in the filler port.

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